Rollup merge of #59603 - matklad:ptrhash, r=Centril

stabilize ptr::hash

closes #56286

Author: Centril

src/libcore/ptr.rs

@@ -2561,7 +2561,6 @@ pub fn eq<T: ?Sized>(a: *const T, b: *const T) -> bool {
 /// # Examples
 ///
 /// ```
-/// #![feature(ptr_hash)]
 /// use std::collections::hash_map::DefaultHasher;
 /// use std::hash::{Hash, Hasher};
 /// use std::ptr;
@@ -2579,7 +2578,7 @@ pub fn eq<T: ?Sized>(a: *const T, b: *const T) -> bool {
 ///
 /// assert_eq!(actual, expected);
 /// ```
-#[unstable(feature = "ptr_hash", reason = "newly added", issue = "56286")]
+#[stable(feature = "ptr_hash", since = "1.35.0")]
 pub fn hash<T: ?Sized, S: hash::Hasher>(hashee: *const T, into: &mut S) {
     use hash::Hash;
     hashee.hash(into);